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Q&A Rapid tanning in humans as a reaction to radiation

Is it reasonably possible for a type of human to exist that rapidly tans in the presence of large amounts of sun/radiation and loses it again afterwards, in a matter of minutes? Also, how might suc...

3 answers  ·  posted 7y ago by John‭  ·  last activity 7y ago by John‭

Question biology physics humans creature-design